This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A124119 #12 Feb 16 2025 08:33:03 %S A124119 1,1,4,1054163 %N A124119 Number of nonisomorphic Steiner quadruple systems (SQS's) S(3,4,v) on v = 6n+2 or 6n+4 points. %C A124119 A051390 is the official version of this sequence and has all the references etc. %H A124119 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SteinerQuadrupleSystem.html">Steiner Quadruple System</a> %H A124119 <a href="/index/St#Steiner">Index entries for sequences related to Steiner systems</a> %e A124119 There are 4 nonisomorphic SQS's on 14 points. %Y A124119 Cf. A124120, A030129, A001201, A030128, A051390. %K A124119 nonn,hard,more %O A124119 1,3 %A A124119 _N. J. A. Sloane_, Nov 30 2006